Carbon Sciences, a California cleantech startup, hopes to turn carbon dioxide emitted by power plants into a useful, valuable substance. By mixing the gas with calcium powder, the company is transforming CO2 into calcium carbonate, or chalk, which is found in everything from toothpaste to plastics. Carbon Sciences’ process creates chalk in a few hours, under high temperature and pressure. The company is working to make the method carbon neutral, less energy intensive, and cheaper than traditional calcium carbonate production.

Story by Sandra Upson. This article originally appeared in Plenty in August 2008.

Copyright Environ Press 2008.